SD1 Drum Sets

I made some User Drums Sets And I want to add some older drum sets I have saved in user drums. can I save in single files to rearrange so I can load seperate? is that posible? or is there a way to load a older user drum set with out loosin new user drum sets i made?

i began a software to insert drumkits from one USD file to another...
i hope finishing it soon...

Thanks Dan